EP 1749042 B1 20080102 - METHOD FOR PRODUCING ELASTOMERIC COPOLYESTERS
Title (en)
METHOD FOR PRODUCING ELASTOMERIC COPOLYESTERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ELASTOMEREN COPOLYESTERN
Title (fr)
PROCEDE DE PRODUCTION DE COPOLYESTERS ELASTOMERE
Publication
Application
Priority
- EP 2005001853 W 20050223
- DE 102004023105 A 20040511
Abstract (en)
[origin: US7829654B2] A process for continuous or discontinuous synthesis of elastomeric copolyesters from polybutylene terephthalate (PBT) and polyoxytetramethylene glycol is described in which the tetrahydrofuran (THF) obtained as a byproduct in synthesis of polybutylene terephthalate from 1,4-butanediol is rectified and then reacted by ring-opening polymerization to form polyoxytetramethylene glycol which condenses with the free or esterified carboxyl groups of PBT to form the copolyester, whereby chain termination and catalyst deactivation are accomplished by adding 1,4-butanediol without separating the catalyst.
IPC 8 full level
C08G 63/78 (2006.01); C07D 307/08 (2006.01); C08G 63/672 (2006.01); C08G 65/20 (2006.01)
CPC (source: EP US)
C08G 63/672 (2013.01 - EP US); C08G 63/78 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005116111 A1 20051208; AT E382650 T1 20080115; CN 100549061 C 20091014; CN 1950425 A 20070418; DE 102004023105 A1 20051208; DE 502005002418 D1 20080214; EA 009917 B1 20080428; EA 200601888 A1 20070227; EP 1749042 A1 20070207; EP 1749042 B1 20080102; TW 200538487 A 20051201; TW I287027 B 20070921; US 2008161530 A1 20080703; US 7829654 B2 20101109
DOCDB simple family (application)
EP 2005001853 W 20050223; AT 05715459 T 20050223; CN 200580014823 A 20050223; DE 102004023105 A 20040511; DE 502005002418 T 20050223; EA 200601888 A 20050223; EP 05715459 A 20050223; TW 94110503 A 20050401; US 57994105 A 20050223